diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index d6cc57e8..7499b7f3 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -7,6 +7,7 @@ on:
 jobs:
 
   check_nightly:
+    if: github.repository == 'f3d-app/f3d-superbuild'
     runs-on: ubuntu-latest
     name: Check nightly is needed
     outputs: